What is the TikTok Door Knock challenge that US police are warning about?

Police in US are warning about the TikTok Door Knock challenge, which encourages individuals to bang or kick doors in middle of the night to startle residents. This viral trend is causing physical and emotional distress for residents of all ages, said police. Several videos have surfaced, with one showing a teenager using a 5-gallon water jug to create disturbance.